Screen holder



Patented Jan. 7, 1930 y ERNST nonnneann, ois- GREAT NECK, naw YonxPATENT ortica SCREEN HOLDER I Original applioationled Iulyl, 1927,Serial No. 205,429?. Divided and this application med" April'e,

1928. serial This application is a division of my prior application,Serial No." 205,429, filed July 13, 1927, andrelates to the stencil orprinting screen and frame therefor, disclosed therein.

The general object of the invention is to provide a screen frame ofsimple, strong and durable construction in which the screen or stencilfabric may be easil and quickly mounted and properl stretc` ed in bothdirections and which a so provides a suitable reservoir for the'liquidcolor.

The characteristics and advantages of the invention are furthersufficiently explained in connection with the following detaildescription ofthe accompanyingv drawings, which' illustrate one reresentative embodiment. After considering this example,

y skilled persons will understand that many .character described in theabove identified variations may be made Without departing fromthevprinciples disclosed, and I contemplate the employment of anystructures that are properly within the scope of the appended claims.

Fig. `1 is a top plan of a screen frame and Vscreen emboding theinvention in one form.

"Fig 2 is a fragmentary, sectional and perspective view, on enlargedscale.

Fig; -3 is a section at 3-3, Fig. 1.

The present frame and screen are desi ned for use inascreen printingmachine o the parent application, but are .not necessarily limited tosuch uses, and may be employed for screen or stencil printing inmachines of other types, or for stencilling by hand operations.

The screen proper consists of a sheet 1 of silk of suitable dimensions,the -margins of which are secured to the edges of a frame 2, so that thescreen fabric overlies one main face of the frame and the inner contourof the frame forms a reservoir for the liquid color.

i The frame consists ofrectangular metal bars 5, 6, 7 and 38, ofWhichbars and 6 are rigidl connected at one corner of the frame, bar ispivotall connectedto bars 5 and'8 and bar 8 is'pivota ly connected tobars 6 and 7. For thisj ur ose a dowel or pin 9 is fixed in a hole griled on an inner face of bar 6 near one end thereof, and the projectingend of this dowel has a bearing fit in a socket 10 formed in theadjacent end of bar 8. Bar 7 is pivotally secured to bar 5 in a similarway. A.

'Fastening strips 14 are provided, detachably secured to the outer facesof all the bars by screws l5.

The screen 1 is applied to the frame by first removing all of thefastening strips, and

securing two opposite margins of the fabric screen to the outer faces ofthe two opposite bars such as 5 and 8, by application of thecorresponding fastening strips 14 and insertion of all of the screwsexcept screws-15. When the fabric margin is secured to bar 8, the bar istilted to angular position as shown in Fig. 3, and after securing thefabric the bar is tilted to plane alignment, thus powerfully stretchingthe screen in one direction, and is secured in that position' byinsertion of an end screw 15 into the end of bar 6. The other oppositemargins of the fabric are then secured to outer faces of bars 6 and 7 inasimilar manner while bar 7 is tilted, and that bar is then turned toplane alignment with the other bars, completing the stretching of thescreen in both directions, and is secured in position by insertion ofthe remaining end screws 15b, whereupon the entire frame is firm andrigid and the fabric tightly stretched over one face thereof, ready forapplication of .a stencil design thereto as ful y explained in the aboveidentified applica/tio paper strips care attached l esively around theinner margins of the frame overlapping 'the upper frame faces, theirinner faces, and

the outer margins of the screen, as best shown in-'Fi 2, to prevent anyleaka e of the liquid co or between the screen an the frame members.

Iciaiinft), l 1. A frame for screens -of the class described, comprisingtwo bars rigidly lsecured at a right angleto each other, and two otherbars each hin edly connected at one end to one of the rigidly connectedbars, the other rovided .for the pivotal con.-A Jacent ends of bars 7and 8,

Before' color is poured :u on the screen Y.

ends of said other bars being hingedly connected together, and means forsecuring a gunmen fahricto guter faul?1 oh the bars and rsecurmg' earsin e 'guinent 2. A screen structurelsI for purposes described,comprising a frame consisting of four bars in rectangular arrangement,two

of the bars being rigidly` connected, and the other two bars being eachhingedly connected at one end to an end of one of the rigidly connectedbars, a hinge block to which the other ends of said other two bars arehingedly connected, fastening strips overlying outer edge faces of thebars, and 'a screen fabric overlying one face of the frame and havingits margins secured between the fastening strips and the outer barfaces.

3. A screen structure for purposes described, comprising a frameconsisting of four bars in rectangular arrangement, two of the barsbeing rigidl connected, and the other two bars be` eac ,hingedlyconnected at one end to an en of one of the rigidly connected bars, ahinge block to which the other ends of said other two bars are hingedlyconnected, fastening strips overlying outer edge faces of the bars, ascreen fabrlc overlying one face of the frame and having its marginssecured between the fastening strips and the outer bar faces, and stripsof sheet material adhesively secured about inner walls of the frame andoverlapping the outward margins of the screen ad acent the frame, topre- Y vent leakage ofli ui color.

35 specification this In testimony w ereof l have signed this 20th da ofFebruary, 1928. ERNS BORREGARD.

